Interrelated hypoalgesia, creep, and muscle fatigue following a repetitive trunk flexion exposure

2021 ◽  
Vol 57 ◽  
pp. 102531
Author(s):  
Daniel Viggiani ◽  
Jack P. Callaghan
Keyword(s):  
Muscle Fatigue ◽  
Trunk Flexion

Effect of Trunk-Muscle Fatigue and Lactic Acid Accumulation on Balance in Healthy Subjects

2008 ◽  
Vol 17 (4) ◽  
pp. 380-386 ◽  
Author(s):  
Ozgur Surenkok ◽  
Ayse Kin-Isler ◽  
Aydan Aytar ◽  
Zuhal Gültekin
Keyword(s):  
Lactic Acid ◽  
Muscle Fatigue ◽  
Dynamic Balance ◽  
Peak Torque ◽  
Trunk Muscle ◽  
Trunk Flexion ◽  
Fatigue Protocol ◽  
Acid Accumulation ◽  
Dependent Samples ◽  
Flexion And Extension

Objective:This study sought to determine the effects of trunk-muscle fatigue and blood lactic acid elevation on static and dynamic balance.Intervention:Fatigue was induced by an isokinetic protocol, and static and dynamic balance were assessed during bilateral stance using a Kinesthetic Ability Trainer. Subjects participated in a fatigue protocol in which continuous concentric movements at 60°/s were performed until the torque output for both trunk flexion and extension dropped below 25% of the calculated peak torque for 3 consecutive movements.Measures:Before and immediately after the fatigue protocol, blood lactic acid measurements and static- and dynamic-balance measurements were recorded.Results:An increase in lactic acid levels was detected in all subjects. According to a dependent-samples t test, significant differences in balance and lactic acid values were found after the fatigue protocol. There was no correlation between lactic acid accumulation (change between prefatigue and postfatigue levels) and balance-score differences.Conclusion:Trunk-muscle fatigue has an adverse effect on static and dynamic balance.

scholarly journals Immediate Effect of Trunk Flexion And Extension Isometric Exercise Using An External Compression Device On Electromyography of The Hip Extensor And Trunk Range of Motion Of Healthy Subjects

2021 ◽  
Author(s):  
Tian-Zong Huang ◽  
Suhn Yeop Kim
Keyword(s):  
Range Of Motion ◽  
Muscle Fatigue ◽  
Healthy Subjects ◽  
Isometric Exercise ◽  
Trunk Flexion ◽  
Endurance Test ◽  
External Compression ◽  
Compression Device ◽  
Onset Timing ◽  
Flexion And Extension

Abstract Background: Low back pain (LBP) is a very common symptom experienced by individuals across all age groups. Previous study established that using a device known as Active Therapeutic Movement version 2 (ATM®2) has been developed to improve pain and joint range of motion (ROM) in patients with LBP. However, no study has examined the physiological change in the muscle through ATM®2-based exercise thus far. This study aimed to determine the immediate effects of ATM®2 exercise on the contraction timing, back extension endurance, muscle fatigue, and trunk ROM of lumbar and lower limb muscles in healthy subjects.Methods: Thirty-six healthy subjects (mean age=23.16±2.3) volunteered to participate in this study. Subjects were instructed to perform ROM test using sit and reach test, back extensor endurance test using Biering-Sorensen test, erector spinae (ES), lumbar multifidus (LM) fatigue and onset time of Gluteus maximus (GM) in prone hip extension using electromyography before and after trunk flexion and extension isometric exercises.Results: The ROM in trunk flexion showed a significant increase by 7.9% after exercise compared to that before exercise (p<0.05). Relative GM contraction onset timing significantly decreased after exercise (p<0.05). The result of the Sorensen test after exercise showed a trend of increase in duration time. Muscle fatigue in the LM, however, showed a significant increase (p<0.05), whereas muscle fatigue in the ES was reduced without statistical significance.Conclusions: The results base on this study showed a significant increase in the trunk ROM after trunk flexion and extension isometric exercise using an external compression device, while the relative contraction onset timing in the GM significantly reduced. Furthermore, the muscle endurance test after exercise showed a trend of increase in the duration time with a decreasing trend in muscle fatigue in the ES. Exercise based on ATM®2 is an effective exercise protocol with an effect on biomechanics of healthy subjects. This exercise may be suitable in clinical practice for patients with LBP, for which long-term effects can be expected.

MUSCLE FATIGUE IN A STANDING HEEL-RISE TEST

1998 ◽  
Vol 30 (2) ◽  
pp. 67-72 ◽  
Author(s):  
Ulla Svantesson, Ulrika Österber
Keyword(s):  
Muscle Fatigue

"Measurement of muscle fatigue using electromyography"

1975 ◽  
Author(s):  
M. M. Ayoub ◽  
H. F. Martz ◽  
Ching H. Wu
Keyword(s):  
Muscle Fatigue

Effect of localized muscle fatigue induced at different joints on postural control

2005 ◽  
Author(s):  
Navrag B. Singh ◽  
Maury A. Nussbaum ◽  
Dingding Lin ◽  
Michael L. Madigan
Keyword(s):  
Postural Control ◽  
Muscle Fatigue ◽  
Localized Muscle Fatigue

MUSCLE FATIGUE: FACTORS OF DEVELOPMENT AND WAYS OF CORRECTION

2017 ◽  
Vol 63 (1) ◽  
pp. 95-104
Author(s):  
T.Yu. Matvienko ◽  
◽  
D.A. Zavodovskyi ◽  
D.N. Nozdrenko ◽  
I.V. Mishchenko ◽  
...  
Keyword(s):  
Muscle Fatigue

The possibility of using myotonometry to assess the muscle fatigue of physical labor workers

2020 ◽  
Vol 60 (11) ◽  
pp. 892-894
Author(s):  
Evgeniya S. Shitova ◽  
Inga S. Malakhova ◽  
Vladislav I. Lemeshko
Keyword(s):  
Clinical Practice ◽  
Occupational Health ◽  
Muscle Fatigue ◽  
Soleus Muscle ◽  
Initial Level ◽  
Maximum Load ◽  
Main Area ◽  
Modern Methods ◽  
The Moment

Introduction. The use of classical methods for diagnosing muscle fatigue of physical workers, including dynamometry and electromyography, is often limited due to the complexity of the process, the inability to use them in production, and the subjectivity of the methodology. At the same time, such a method as myotonometry does not have these disadvantages, but the main area of its use at the moment is clinical practice. The aim of study was to determine the possibility of using myotonometry to assess muscle fatigue. Materials and methods. In the course of the study, the biomechanical characteristics of muscles that differ in their depth were evaluated using the "MyotonPro" device (Myoton AS, Estonia). We determined the tone and stiffness of the biceps of the shoulder, the soleus muscle, and the muscle that straightens the back at different periods of time under the influence of maximum load on them. Results. It was found that the studied parameters of these muscles immediately after performing a series of exercises "to failure" statistically significantly increased, and after 30 minutes - again decreased, but did not reach the initial level. Conclusions. The myotonometric study showed objectivity, reliability, repeatability and proved to be one of the most promising modern methods for assessing muscle fatigue, including for solving problems in the field of occupational health.

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